不确定非线性时滞关联大系统自适应分散容错控制

摘要

针对一类不确定非线性时滞关联大系统,提出了一种基于时滞代换的自适应分散容错控制方案.该方案采用模糊逻辑系统作为逼近器,提出了时滞代换的方法处理系统未知时滞关联函数,并结合自适应技术处理代换误差和逼近误差.与现有方法相比,本文方法能在线补偿所有四种类型的执行器故障,系统控制器的设计也不再依赖于时滞假设条件,同时还可保证闭环系统所有信号全局一致最终有界.仿真结果进一步验证了本文方法的有效性.%In this paper, a delay replacement based adaptive decentralized fault-tolerant control method is proposed for a class of uncertain nonlinear time-delay large-scale systems. With fuzzy logic systems as approximators, a novel delay replacement technique is proposed to deal with the unknown delayed non-linear interconnection functions, and adaptive technique is com-bined to deal with the errors of replacement and approximation. Compared with the existing results, all of the four types of actu-ator faults can be compensated for online, the controller design is no longer depended on the assumptions of the time-delays, and the globally uniformly ultimately boundedness of the closed-loop system is guaranteed. Simulation results are provided to show the effectiveness of the control approach.